Lock or bolt for doors and the like



F. F. WILKINS.

LOCK OR BOLT FOR DOS AND THE LIKE.

APPLICATION FJLED M159, 1919.

1,347,799. Patented July 27,1920.

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/M/zvVYD/J UNITED STATES PATENT orricE l FREDERICK FRYER WILKINS, OF 'WEST KILBURN, LONDON, ENGLAND, ASSIGNOR TO BENJAMIN EDSALL JOHNSON, 07F` LONDGS, ENGrLAND.l

LOCK OR BOLT FR DOORS AND THE LIKE.v

4' Specicaton of Letters Patent. Patented Jlrlly 27, 1920 .l Application led `June 9, 1919. Serial No. 302,856.-v

To all whom it may concern:

Beit known that i, linnnnnion FRYERA.

WiLinNs, a subject of the King of Great Britain and lreland,and a resident of West Kilburn, county of London, England, have invented a certain new and useful improvement in Locks or Bolts for Doors and the like, of which the following is, a specification.

rlhis invention hasv reference to that type of lock or bolt for doors, easements and the like wherein no key is employed, the bolt proper being spring-controlled and operated in a casing by a simple slide action from the exterior or the interior of such door, andinv which there is embodied a means for locking the bolt in its outward position, consisting of an auxiliary bolt in the casing which may be slid up to and abut on the interior end of the bolt, and which is retained in the locking position by giving'it a partial turn, causing a knobbed spindle on the auxiliary bolt to enter a notch of a slot in the casing. ln the present invention the construction is improved by inclosing the bolt action more completely to protect it from dust and the eii'ects of the weather. the knobbed spindles of the two bolts'work are reduced to minimum dimensions and the spring is concealed from view and is not exposed to injury from dust and damp.

A further improvement is also made in Y order to make the bolt action more reliable and to eliminate any risk of the coils of the spring jamming against'the inner ends of the two bolts, by making the main bolt tubular or hollow for a part of its length and prolonging the reduced end of the auxiliary bolt so that it is always contained in the hollow of the main bolt and in correct alinement therewith. rlhe spring thus surrounds the reduced portion of the auxiliaryl The slots in whichy improved f i the vauxiliarybolt with `knobbed spindle z' which slides inthe slot e and by a partial l turn up or down can be inserted into the notch y', thus lockingY the bolt c and preventing it from being drawn back, as its end butts against the auxiliary bolt L, theregulced portion g sliding in the hollow h of o t o. Y

The back of the base plate n is preferably overlapped top and bottom by the edges of the outer casing, so insuring the complete inclosure of the working elements. v i

To prevent the knobbed spindle ,i of the auxiliary bolt h contacting against and bui-ring the end of the slot in the casing, the back plate is inturned at n so that the end o of the bolt h takes up any percussion caused by the spring The opening p is closed by a cover plate p adapte/d to the spindle on which the knob d is mounted. n

Having now described my invention, what I claim as new and desire to secure by Letters Patent of the United States is l. A, latch device including a casing havn ing an'opening, a main latch member slidable therein and having a socket in one end, a locking bolt arranged within the casing and having a reduced end portion adapted to fit in said socket of the main latch bolt, a spring coniined between the end of the main latch bolt and the shoulderl formed at the junction of the reduced end portion of the locking bolt with the body thereof, and a handle carried by the body ofthe locking bolt and cooperating with the opening in Vthe casing to be held in locked position.

2. A latch device of the class described including a slotted casing, a main latch member and a locking bolt slidably arranged within the casing, a spring interposed be-vv tween said main vlatch and the locking bolt, and a handle projecting from the locking bolt and cooperating with a slot of the casing'to hold the locking bolt in a fixed position when the mainvlatch and locking bolt are relatively close together to lock the said main latch bolt againstl backward move- Y ment. Y

3. A latch device of the class described including a casing having a substantially T-shaped slot, a main latch member slidable in one end of the casing, a locking bolt slidf able in the opposite end of the casing, a spring between said latch and bolt, and a through Ythe T-sheped slot of the casing,

whereby when theV same is positioned vin the' head of `the,T-sllztped 'Slot the bolt Willbe' heldin looking relationiwth reference to. the

Y latch;

4; Anleteh device of the class ldescribed i including `a' -Acasing "ha-ving at longitiidinl slot and also a T-shapedrslognlatehmemher Vslldalole in thercasing and 'having a. tra-nsiversely dsposedzha-ndle portion :projecting y through the longitudinalfslotofnthe casing, 4 saidlnteh ;me1nber also having 11a vso'ekeme Y )locking bolt -slidablygmounted nathe `other Vendof the easing and having a reduced end portion for engaging in the socket of the latch member, a' spring Vsifirrouriding thereducedend portion of thebolt and confined between thefshonlder thereof and the end of the latch, and a handle projecting from Said bolt; through the T-Shaped slotrwherbyY `When 'thehnndle is in the head of Seid Slot v therredueediendiportion of the bolt will be Y held in looking enga-gement Withfreferenee In testimony 'whereof I hevenffixed my signature heretof this:` 21st day of May, 1919.

to the socket endrofltheiletehl .Y JEREDERICK :EREER `.WILKINS Y 

